Carbureter.



CARBURETER.

APPLICATIGM FILED FEB.12.1915.

1 1 80.1483 y Patented Apr. 25, 1916 Wit/messes Cludlc Fgdin,

C. FOGOLIN.

CARBURETER.

APPLICATION FILED '15.12.1915.

1,180,483. Patented Apr. 25,1916.

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E. AS-efe Q2 y /q'b'borney C. FOGOLIN.

CARBURETER.

APPLICAUON FILED f.12.1915.

Patented Apr. 25, 1916.

3 SHEETSf/SHEET 3- C louche Fogolm Tnvenbor, by www Witnesses f/bborney 1 En S'rrrree PATENT ermee.

CLAUDIO FOGOLIN, OF TURIN, ITALY, ASSIGNOR TO LANCIA & C., OF TUR-IN, ITALY, A FIRM.

CARBURETER.

To all 'w 710m t may confiera Be it known that l, Cnxuoio Fooomx, re eidingr at Turin, Italy, have invented'oertain` new and useful Improvements in (farburetere` of which the followingr a speel lication.

This invention relates to a multiple earbureter eonuirising three earhureting chainhers or Sections indeiialndent from each other, one of which is intended to supplyY the mixture to the cylinders of the engine when the engine is running with low Speed (by way of example when it is being started), the second one is intended to come in operation when the engine runs with normal speed, Said Second element' being added to the lirst one it' required.v and the third section comefy in operation automatically when the engine runs with full Speed.

A further feature of the carburetor according' to this invention is that the supplementary air is supplied o v two air inletg independent from each other., the first one corresponding with the two sections of the carbureter working at normal speed and loe ing Subject to a double control, while Athe other one is arranged on the suction duct of the engine and is intended to come in operation when the suction exceeds the ina irnum corresponding with the normal speed, by 'ay of example in the oi' the speed of the engine being Suddenly reduced.

A construction of the carhureter accordingr` to this invention is shown h v wayT of example in the annexed drawings and lFigure lY is a vertical section thereof, Fig. 2 is a Section on :1f-.r ol Fig. l, Fig'. 3 shows the. controlling plug in section; Fig. 4 i5; a, partial section oi the earlfiurel'er the parte being shown in another poeition; Fig. 5 is the corresponding perpendieulan section; Fig'. (S is a partial Section the parts being in still another position and Fig. 7 the correspondingv perpendieular election. s shown in the drawings. the earlgiureter comprises three sections l. and (l, each havin;` independent mixing chaudiere. The section A comprises the nozzle l. connor-.ted with the conetant level tank ll liv means olf the duet 2 and arraugel in a vlindrioal chamber l. an annular passage heinew left between the wall of said ehainher and the head 5 of the nozzle 1.

The second Section l comprises the nozzle G arranged in the chamber S intended to be Specification of Letters Patent.

Patented Apr. 25, 1916.

serial no. 7.836.

passed through by the air, said nozzle being mounted on the pipe 3 projecting from the tanl 3 and connected with thisI tank oy the paeeage T; a Spherical l'iead 6 is 1preferably provided at the end of the nozzle.

The third element C (Fig. 2) is provided with a nozzle 9 secured to the pipe 3 and ronnected with the tank 3, said nozzle beinf.: arranged in the chamber l() which cornmunii'ates with chamber l0. valve l2 is arranged lietween the chan'ibers l() and l0. this valve heilig` secured to a hollow siem Vlf3 fdiding in pipe 13 solid with the piston ll arranged in the cylinder l5; a .springA l actiiig on piston ll holds the valve l2 in Contact with its seat. The hoti'om ot the cylinder l5 communicates with outside h v means of holeszvli1 and the upper end communicates with the chamber l0 by the hollow stem 13 and hole '1.3'. liu this waty the valve l2 is raised from its seat when there is Such a difference between pressures in the lower portion of the c vlinder l5 and Chamher l0' (owingr to the suction exerted in this latter b v the engine) as to overcome the spring and raise the piston il.

The control of the sections A. B and C is eli'ected h v means of a suitable member capable of bringing into operation Said seolions in the proper succession. ln the oon- .struction illustrated thisl controlling memher is shown in form of a hollow plug rotatabl)Y mounted in a suitable chamber l) arranged between sections A, l, C and the .suction duct ll leading' to the engine. cylinders. Said plugv 1S is, provided with ports 2() and 20 opposite to each othe a hole 19 and a. transverse duet lll h v moanaL of which the suction duct Yll connected with chamhers B and A according to requirements as hereinafter described. The plug 1S is provided with a spindle 1S on which the oontrollingr lever secured, this lever being actuated b v hand or in any Suitable wayY in order to Qontrol the operatioirof the carhul re'cer and the, running' of the engine. In order to hold the plugy le in the required position. recesses are provided on the front wall of the plug. which are engaged by the pin 3T acted on hy the spring 39 arranged in a chamber 40 provided on the cover 36 closing the ehamher D.

'The auxiliary air inlet E allows the air to enter the carbureter only When the ports 20, 20 are `uncovered and the section B is in operation, being on the contraryv cut out when only the section A is in operation, on account of the chamber 21 communicating .vith the inner chamber of the hollow plug 18 while the section A communicates directly with the suction duct 11 by means of the duct 19. rllhis air inlet E comprises a cylindrical box 21 provided with the piston 22 which is held by the spring in the po- Sition shown in Fig. 1, and is connected with the valve by means of the stem 2l, said valve 25 closing the hole 25 through which the auxiliary air enters the chamber 25 communicating with the cavity of plug 18. This stem 21 is hollow and provided with fholes 26 causing the hollow plug 18 of the cock to communicate with the-chamber 21 so that when a 4suliicieni'g suction is exerted in the plug 18 and chamber '21,.the piston 22 is operated by the atmospheric air pressure acting through holes 21 provided in the cover 21' of the box 21 and the valve 25 is lowered so that the hole 25 is opened and the auxiliary air is enabled to reach the chamber 25l and the cavity of plug 18. The stem 21 is encircled by a second spring which is shorter than spring 23 and is intended to prevent the piston from falling beyond the required position when suction in box 21 corresi'ionds with the operation of the section B. Another supplementary air inlet is provided on the suction duct 11, comprising a valve 28 held in contact with its scat 32 by the spring 33 encircling the stem 31 and capable of being adjusted by the cap 84- and nut 31 screwed on the stem 31. The valve is inclosed in a chamber` 29 provided with holes 80.

The operation is as followsze-l/Vhen the engine is to be operated with low speed, as when it is being started, the lever 35 is actuated and the plug 18 is carried in the position shown in Fig. 3, the duct 19 causing the section A to communicate with the suction duct 11, and the air inlet 21 is cut out (Figs. 1 and 2). For increasing the speed of the engine the plug 18 is rotated clockwise; then the duct 19 is closed and the section B is caused to communicate with the duct 11 by means of slots 20, 20 so that the auxiliary air rinlet E is put in operation, this inlet being prevented from being fully open by the spring 27 stopping the piston 22 (Figs. 4 and 5). The plug 18 being further rotated clockwise, the chamber 10 ,is put in communication with the duct 11. Then the increasing suction of the engine works in chambers 8, 10 and 15 (through the hole 13 and the hollow stem 18) so that the pist0n 14 is raised by the atmospheric pressure overcomingr the spring 16, the valve 12 is opened and the section C is put in .operation, the area, of the air inlet being correspondingly increased as the piston 22 and valve 25 are lfurther moved again-st the action of spring 23 owing to the increased suction due to the speed of the engine. liVhen the plug 18 is reaching the end ot its ro tation the section A again inserted by means of the hole 19 (Fig. (3) in the plug 18, the duct 19 being on the centrar).lclosed, so that also the mixture supplied by this section is mixed with the supplementary air supplied by the valve lVheu it is desired to reduce the speed of the eng-inethe plug 18 is rotated in the opposite direction, so that the hole 12'!" is again closed and then the chamber 10 cut out. the further rotation of the plug cutting out also the section B and the section A coming finally in communication with the suction duct 11 by means of the duct 191 It is known that when it is required to reduce the speed of the engine the cock of the carbureter is suddenly brought into its first position in which only the section A is in operation, ln these rases the engine be-y ing running with Tull speed minding sonic further time owing to ineria of the moving parts. a very strong suction is exerted in the carbureter and a corresponding .large amount of fuel is supplied by the nozizle, the supply of aii' being on the contrary insufficient as the small section A is not. prt vided by itselfl with automatic means tor controlling the supply of supple ientary air. In this case and in any other case in which the suction in the duct 11 exceeds a: predetermined amount, the valve 28 comes in operation, the spring 88 controlling said valve being properly adjusted in order that the mixture supplied to the duct 11 has always a constant composition.

With a carburcter made according to this invention a mixture/mc constant composition is obtained in any case` said mixture being supplied by three sections one of which may be put in operation by the suction of the engine while when there is a sudden increase in the suction an automatic air inlet arranged in the suction duct is open.

lVhat 1 claim as my invention and desire to secure by United States Letters Patcnt is:-

1. 1n a carbureter, main chamber and an auxiliary chamber' independent from each other and each having a. nozzle, an automatic valve closing the auxiliary chamber. a member arranged between the outlets of said chambers and the suction duct of thc engine, said meniber being capable of opening either the outlet of the small chamber; or that ot thev main chamber7 or the outlets of the auxiliary and main chambers at the same time. or finally the outlets of the three chambers at the same time, and means for operating said member.

2. In a carbureter, a small chaml main chamber and an. auxiliary chamber a small chamber, a

dependent from each other and each having a nozzle, an automatic valve controlling the auxiliary chamber actuated by the suction in the same chamber, a member arranged between the outlets of said chambers and the suction duct of the engine, said member being capable of opening either the outlet of the small chamber, 0r that of the main chamber, or the outlets of the auxiliary and main chambers at the same time or finally the outlets ot the three chambers at the same time, and means for operating said member.

3. In a carbureter, a small chamber, a main chamber and an auxiliary chamber independent from each other and each having a nozzle, an automatic valve controlling the auxiliary chamber, a hollow plug arranged between the outlets of said chambers and the suction duct of the engine, an opening in the wall of said plug intended to register with the suction duct, openings in the wall of the plug intended to properly register with the outlets of the chambers, means for operating said plug, and means for allowing auxiliary air to enter the hollow plug when the main and auxiliary chambers are in operation.

4. In a carbureter, a small chamber, a main chamber and an auxiliary chamber, independent from each other and each having a nozzle, an automatic valve controlling thel auxiliary chamber, a hollow plug arranged between the outlets of said chambers and the suction duct of the engine, a diametrical duct in .said plug for causing the small chamber to communicate with the suction duct, openings in the wall of the plug intended to register with the suction duct and the outlets of the chambers, means for controlling said plug and an additional air inlet comnmnicating with the inside of the hollow plug.

5. In a carbureter, a small chamber, a main chamber and an auxiliary chamber independent from each other and each having a nozzle, an automatic valve controlling the auxiliary chamber, means arranged between the suction duct of the engine and the outlets ot the chambers for bringing into operation either the small chamber or the main chamber or the main and auxiliary chambers and a valve arranged on the suction duct of the engine for allowing the air to enter Said duct when the suction is unduly increased.

In testimony whereotl I alix my signature in presence of two witnesses.

CLAUDIO FQGOLIN.

\Vit11esses:

(AnLo Toirrns, C. S. FEYLES. 

